GE CLST 70A Final: Final Review Questions

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peachfox660

13 Aug 2016

School

UCLA

Department

General Education Clusters

Course

GE CLST 70A

Professor

Larkin James

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Document Summary

The orbits are close to the same plane. Jovian planets have a lower density because they are made mostly of gas, unlike the rocky terrestrial planets. They typically form in the outer portions of solar systems because the temperature is lower, allowing gas to exist in solid form. Closer to stars, only rock and metal can condense. Gas are also much more abundant in space, which explains the bigger size of jovian planets. The planets all orbit in the same direction. Their orbits are close to the same plane. Those regularities can be explained by the protoplanetary disk theory (see question 1). There are some exceptions: venus has a retrograde motion and the spin axes of the planets are not perfectly aligned (which might be explained by large impacts late in the history of accretion) Volatility: determines a molecule"s state under particular conditions of temperature and pressure.

Related Questions

125. Use the concepts in this chapter to obtain an estimate for the number of atoms in the universe. Make the following assump- tions: (a) All of the atoms in the universe are hydrogen atoms in stars. (This is not a ridiculous assumption because over three-fourths of the atoms in the universe are in fact hydrogen. Gas and dust between the stars represent only about 15% of the visible matter of our galaxy, and planets compose a far tinier fraction.) (b) The sun is a typical star composed of pure hydro- gen with a density of 1.4 g/cm and a radius of 7 x 108 m. (c) Each of the roughly 100 billion stars in the Milky Way gal axy contains the same number of atoms as our sun. (d) Each of the 10 billion galaxies in the visible universe contains the same number of atoms as our Milky Way galaxy.

Use the concepts in this chapter to obtain an estimate for the number of atoms in the universe. Make the following assumptions: A)Assume that all of the atoms in the universe are hydrogen atoms in stars. (This is not a ridiculous assumption because over three-fourths of the atoms in the universe are in fact hydrogen. Gas and dust between the stars represent only about 15% of the visible matter of our galaxy, and planets compose a far tinier fraction.) B) Assume that the sun is a typical star composed of pure hydrogen with a density of 1.4 g/cm^3 and a radius of 7 x 10^8m. C) Assume that each of the roughly 100 billion stars in the Milky Way galaxy contains the same number of atoms as our sun. D) Assume that each of the 10 billion galaxies in the visible universe contains the same number of atoms as our Milky Way galaxy.

Helium is very common in the Sun and calcium is rare. Why arehelium lines weak and calcium lines strong in the visible spectrumof the Sun?

How would a star regain its state of equilibrium if the energygeneration rate of a star were to become slightly smaller than itsequilibrium?

Why do metal poor stars have the most elliptical orbits? Fromwhere do they obtain their metals?

why do so few visual binary star systems been fully analyzedto reveal individual masses?

When we look at light curve for an eclipsing binary systemwith total eclipses, how can we tell which star is hotter?

Why do extremely cool stars look fainter than we might expectfrom their luminosities and distances?

Why can't we use solar type stars as spiral tracers? what typeof stars make good spiral tracers? why? What characteristics dothey have to perform this function?

in some old, dense stars, a few blue stars, known as bluestragglers are seen. why are blue stars unexpected in suchclusters? If stars that stick together mix their materialthoroughly when they collide, how might you explain such bluestars?

Supposed you jumped into a black hole feet first? what wouldhappen to you? what would your friends who stayed behind actuallysee?

Why are there different types of galaxies?

what is the eventual fate of the milky way galaxy? whatprocess will lead to this fate? can anything change this?

What are the processes that are responsible for the formationof an elliptical galaxy in comparison to a spiral galaxy? Whycannot galaxies evolve from elliptical to spiral and from spiral toelliptical?